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Which? Tax calculator 2017-18

Independent, tailored help with your income tax return

Calculate and submit your self-assessment tax return online

We've teamed up with SimpleTax to bring you an online self-assessment tool allowing Which? members to calculate their tax return and submit it directly to HMRC for just £10 (£36 for non-members).

Easy to use and jargon-free personal tax calculator

Safe and secure - protected by 256-bit encryption

A simple and quick way to calculate your tax return

Officially recognised by HMRC

Tips that could save you money on allowances and expenses you might have missed

Become a Which? member and submit for just £10 (£36 for non-members)

Do I need to complete a self-assessment tax return?

If HMRC has asked you to complete a self-assessment return for 2017-2018, you must complete it before 31 January 2019 or face a £100 fine. Some people (those who are self-employed, for example) need to complete a tax return every year; others
are sent one because they have untaxed income (often from property).

Disclaimer

Although the publisher endeavours to make sure the information in this calculator is accurate and up-to-date, it is only a general guide nothing in it constitutes taxation advice by Which?. You should consult a qualified tax adviser who can
consider individual circumstances if taxation advice is required. Which? Limited does not accept any liability for any loss or damage suffered as a consequence of relying on any information contained in this guide.